Milled Phosphatic Chalk
Ground phosphatic chalk, a soft natural calcium phosphate-rich sedimentary rock, used in soil amendments and as a phosphate source. Falls under HTS 2510.20.00.00 for ground forms, explicitly including phosphatic chalk per the heading.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If in unground lump form
Natural chalk without milling stays in 2510.10 as unground.
If low-phosphate and considered mineral earth
Impure or low-P variants may fall under 2530 as other mineral substances.
If calcined into finished chalk products
Heat-treated articles become worked mineral products in Chapter 68.
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Import Tips & Compliance
• Distinguish from writing chalks excluded under chapter note (k) by providing end-use affidavits; comply with soil additive regulations; batch-test for P2O5 content
Related Products under HTS 2510.20.00.00
Ground Phosphorite Rock
Finely ground natural calcium phosphate rock extracted from sedimentary deposits, used primarily as a raw material in phosphate fertilizer production. Classified under HTS 2510.20.00.00 as ground natural calcium phosphates, distinguishing it from unground ores in 2510.10. It meets the chapter definition for mineral products not covered by other headings like chemical precipitates.
Ground Florida Pebble Phosphate
Ground phosphate pebbles from Florida deposits, a natural calcium phosphate used in animal feed supplements and fertilizer bases. HTS 2510.20.00.00 applies to its ground form as natural calcium phosphates, separate from unprocessed rock.
Ground Apatite Ore
Pulverized apatite, a natural calcium phosphate mineral ore, ground for use in producing phosphoric acid and fertilizers. HTS 2510.20.00.00 covers ground natural calcium phosphates like apatite.
Pulverized Phosphate Rock Flour
Ultra-fine ground phosphate rock resembling flour, used directly as slow-release fertilizer or in micronutrient mixes. Classified in 2510.20.00.00 due to its ground natural calcium phosphate nature.
Ground Natural Aluminum Calcium Phosphate
Milled phosphorite containing aluminum calcium phosphates, used in specialty fertilizers. HTS 2510.20.00.00 explicitly includes ground forms of both calcium and aluminum calcium phosphates.
Ground Moroccan Phosphate Rock
Ground high-grade phosphate from Moroccan mines, a key global source of natural calcium phosphates for fertilizer industry. Fits 2510.20.00.00 as ground natural calcium phosphates.